ReactiveWorksApps I built to use myself,
shipped to the stores.
ReactiveWorks makes everyday apps and ships them to Google Play and the App Store, from planning through release and upkeep. I also build apps and websites for clients.
Recently updated
All apps| App | Description | Platform | Updated |
|---|---|---|---|
 물타기 본전 계산기 | 물린 평단, 본전까지 몇 % 남았는지 한눈에 | Android | 2026-10-03 |
 Idiom Day: Korean Idiom Quiz | One Korean four-character idiom a day: fill the blank, then learn its meaning. | Android | 2026-10-02 |
 코드줍 | 이제 아이폰에서도! 흩어진 할인코드 한곳에 | Android / iOS | 2026-10-02 |
 Egg Hatch Tycoon | Tap eggs awake and collect cute friends. Dew keeps building while you're away. | Android | 2026-10-01 |
 MP3 to Guitar & Ukulele Chords | Upload an audio file and get a chord chart, TAB and backing track to play along | Android | 2026-09-30 |
 SledPick | Race your list on icy tracks | Android / iOS | 2026-09-24 |
Services
I build apps and websites for small teams and founders, from the first plan to the store listing, drawing on the apps I ship and run myself.
- App MVPsTurn an idea into a first version that passes store review, starting with the features that matter.
- WebsitesCompany and product sites, landing pages and simple admin screens.
- Store launchesGoogle Play and App Store setup, review back-and-forth, screenshots and listing copy.
- MaintenanceNew features and bug fixes for apps and websites that are already live.
Contact
siwooeo@gmail.comTell me about the app or website you have in mind, or ask about one of the apps. Send an email or use the form and I will reply.